三維肝臟超音波彩視法研究

Abstract

二維超音波影像發展至今有許多瓶頸無法突破，發展三維超音波影像為了讓超音波系統尋求更多影像技術上的突破，我們的論文重點在於發展三維超音波影像，實驗部分說明如何由控制步進馬達移動帶動探頭來掃描取得超音波三維資料集，原理部分是探討重建使用的方法，我們驗證許多種體積彩視法來處理三維影像，包含：最大值投影法、平均值投影法、最大距離投影法、重心法、衰減強度法、光線投擲法、梯度投影法。還有綜合幾個方法以HSV MODEL的色彩顯示模式，讓我們對於超音波系統掃描後的資料有更直覺的資訊提供模式，我們的最終是希望能使用在臨床診斷上，所以我們先以豬肝來做掃描分析，以印證我們提出的各種重建方法功用和使用的範圍及效果。

Nowadays 2D ultrasonic imaging technique still has some drawback need to overcome. In order to surmount these problems, It is necessary to develop a new 3D ultrasonic imaging technique. In this study, we would illustrate how to control stepping motor and drive the transducers to receive the 3D data of liver. Theoretically, we would discuss the methods of image reconstruction. We used some volume rendering to process 3D ultrasonic image. The volume rendering method includes maximum value projection, average value projection, distance to maximum value, center of gravity, attenuated intensity, ray casting and gradient magnitude projection. By integrating all the methods above and HSV MODEL color display mode, we will have more direct vision of the ultrasonic image. Preliminarily, we use pork liver for the experimental test and then evaluate the efficiency and operational range of the methods of image reconstruction proposed in this study.